compiler/clib/getfsstat.c

   1 /*
   2     Copyright © 2004-2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7
   8 #include <string.h>
   9 #include <errno.h>
  10 #include <sys/mount.h>
  11 #include <proto/dos.h>
  12 #include <dos/dos.h>
  13 #include <proto/exec.h>
  14 #include "__upath.h"
  15
  16 short getnixfilesystemtype(LONG id_DiskType)
  17 {
  18     switch(id_DiskType)
  19     {
  20         case ID_DOS_DISK:
  21         case ID_FASTDIR_DOS_DISK:
  22             return MOUNT_ADOS_OFS;
  23         case ID_INTER_DOS_DISK:
  24             return MOUNT_ADOS_IOFS;
  25         case ID_FFS_DISK:
  26         case ID_FASTDIR_FFS_DISK:
  27             return MOUNT_ADOS_FFS;
  28         case ID_INTER_FFS_DISK:
  29             return MOUNT_ADOS_IFFS;
  30         default:
  31             return MOUNT_NONE;
  32     }
  33 }
  34
  35 /*****************************************************************************
  36
  37     NAME */
  38 #include <sys/mount.h>
  39
  40     int getfsstat(
  41
  42 /*  SYNOPSIS */
  43     struct statfs *buf,
  44     long bufsize,
  45     int flags)
  46
  47 /*  FUNCTION
  48         Gets information about mounted filesystems.
  49
  50     INPUTS
  51         buf - pointer to statfs structures where information about filesystems
  52             will be stored or NULL
  53         bufsize - size of buf in bytes
  54         flags - not used
  55
  56     RESULT
  57         If buf is NULL number of mounted filesystems is returned. If buf is
  58         not null, information about mounted filesystems is stored in statfs
  59         structures up to bufsize bytes
  60
  61     NOTES
  62
  63     EXAMPLE
  64
  65     BUGS
  66         f_flags, f_files, f_ffree and f_fsid.val are always set to 0
  67         f_mntfromname is set to an empty string
  68
  69     SEE ALSO
  70
  71     INTERNALS
  72
  73 ******************************************************************************/
  74 {
  75     STRPTR name;
  76     BPTR lock;
  77     struct DosList *dlist;
  78     struct InfoData data;
  79     int fscount = 0; /* number of filesystems */
  80     LONG ioerr = 0;
  81
  82     dlist = LockDosList(LDF_READ | LDF_VOLUMES);
  83     while ((dlist = NextDosEntry(dlist, LDF_VOLUMES)) != NULL)
  84     {
  85         if(IsFileSystem(AROS_BSTR_ADDR(dlist->dol_Name)) == FALSE)
  86                 continue;
  87         fscount++;
  88
  89         /* If buf is NULL just count filesystems */
  90         if(buf == NULL)
  91             continue;
  92
  93         /* See if another structure can be stored */
  94         bufsize -= sizeof(struct statfs);
  95         if(bufsize < 0)
  96         {
  97             fscount--;
  98             break;
  99         }
 100
 101         /* Create a volume name */
 102         if(!(name = (STRPTR) AllocVec(AROS_BSTR_strlen(dlist->dol_Name) + 2,
 103             MEMF_CLEAR | MEMF_ANY)))
 104         {
 105             ioerr = ERROR_NO_FREE_STORE;
 106             break;
 107         }
 108
 109         strcpy(name, AROS_BSTR_ADDR(dlist->dol_Name));
 110         strcat(name, ":");
 111
 112         /* Get filesystem data from lock */
 113         if((lock = Lock(name, SHARED_LOCK)))
 114         {
 115             if(Info(lock, &data))
 116             {
 117                 /* Fill statfs structure */
 118                 buf[fscount - 1].f_type = getnixfilesystemtype(
 119                     data.id_DiskType);
 120                 buf[fscount - 1].f_flags = 0;
 121                 buf[fscount - 1].f_fsize = data.id_BytesPerBlock;
 122                 buf[fscount - 1].f_bsize = data.id_BytesPerBlock;
 123                 buf[fscount - 1].f_blocks = data.id_NumBlocks;
 124                 buf[fscount - 1].f_bfree = data.id_NumBlocks -
 125                     data.id_NumBlocksUsed;
 126                 buf[fscount - 1].f_bavail = data.id_NumBlocks -
 127                     data.id_NumBlocksUsed;
 128                 buf[fscount - 1].f_files = 0;
 129                 buf[fscount - 1].f_ffree = 0;
 130                 buf[fscount - 1].f_fsid.val[0] = 0;
 131                 buf[fscount - 1].f_fsid.val[1] = 0;
 132                 strncpy(buf[fscount - 1].f_mntonname, __path_a2u(name),
 133                     MNAMELEN);
 134                 buf[fscount - 1].f_mntfromname[0] = '\0';
 135             }
 136             else
 137             {
 138                 ioerr = IoErr();
 139             }
 140             UnLock(lock);
 141         }
 142         else
 143         {
 144             ioerr = IoErr();
 145         }
 146         FreeVec(name);
 147         if(ioerr)
 148             break;
 149     }
 150     UnLockDosList(LDF_READ | LDF_VOLUMES);
 151
 152     if(ioerr) {
 153         errno = __arosc_ioerr2errno(ioerr);
 154         return -1;
 155     }
 156     return fscount;
 157 }